ronschreck
Joined: 04 Aug 2006
Posts: 192
Location: Gold Hill Airpark, NC (NC25)
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 Posted: Thu Feb 08, 2007 3:38 am Post subject: Purge Valve Safety Spring |
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Charles,
I did exactly what you suggested. I used a throttle return spring from the AutoZone aircraft aisle. Ran it from the purge valve arm to a AN3 bolt (one with a hole in the threads) on my baffles. It has enough force to return the purge valve actuator arm to the RUN position. I have never found a need to leave the valve in the ICO position so having it spring loaded to RUN is no imposition and it gives me peace of mind..
Ron Schreck
RV-8 "Miss Izzy"
Gold Hill Airpark, NC
From: Charles Brame <chasb(at)satx.rr.com> Subject: AFP Purge Valve Safety Spring
Interesting discussion on purge valves. No problems with my AFP Purge
Valve and it came with all the screws already safety wired.
I worry about the valve cutoff arm inadvertently closing during
flight resulting in an engine shut down. I've connected the arm to
the cockpit with a Bowden cable which locks in "Run" position.
However, I worry what would happen if the cable breaks or comes loose
at the control arm. The solution seems to be a spring that would hold
the arm to the "Run" position.
Has anybody installed such a safety spring and how did you arrange it?
Charlie Brame
RV-6A N11CB
San Antonio
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